User Guide

7 of 8
- Application
Boiler Control 260
A 260-4
03/09
Copyright ©2009 A 260-4 03/09
Note: This is only a concept drawing. The designer must determine whether this application will work in his system and must ensure compliance with
code requirements. Necessary auxiliary equipment, isolation relays (for loads greater than the specified tekmar internal relay ratings), and other safety
and limit devices must be added.
Mechanical
Boiler
Sensor
(S1) 082
Outdoor
Sensor (S2) 070
DHW
Tank
A1
A2
P1
Z2Z1 Z3
R1 R2 R3
T1 T2 T3
Class 2
Transformer
120 V (ac)
24 V (ac)
260
Electrical
A1 = DHW Aquastat
A2 = DHW High Limit Aquastat
P1 = DHW Pump
R1, ..., R3 = Relay 003
S1 = Boiler Sensor 082
S2 = Outdoor Sensor 070
T1, ..., T3 = Thermostats
U1 = tekmar Timer 033 (optional)
Z1, ..., Z3 = Zone Pumps
Boiler
260
12468 10 11
Boiler
Demand LN
3
Power
5
9
Boil
Do not apply power
13 14 15 16 17 18
Com
Sw
UnO
Com
Boil
Out
12
Indr
DHW
Demand
7
P1 N
DHW
Pmp/Vlv
Boiler
10A
10A10A
24 V (ac)
120 V (ac)
Class 2
Transformer
A2
P1
A1
= Required
= Optional
= Not Used
N
L
U1
S1
S2
R1
R2
R3
Z1
Z2
Z3
T3
T2
T1
C
R
3
4
6
5
7
2
1
8
3
4
6
5
7
2
1
8
3
4
6
5
7
2
1
8
Return
Off
Installer
Advanced
DHW during UnOcc
DHW Pump
Off
DHW Priority
DHW Valve